XAF之在运行时修改Chart

最新推荐文章于 2024-01-10 15:20:13 发布

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本文介绍如何使用DevExpress库在C#中动态管理Chart控件，包括创建、修改系列（Series），改变图表风格并保存更改。通过具体实现方法，读者可以了解到如何在不使用向导的情况下灵活地调整图表。

如题，在代码中修改Chart，并将修改保存，不必调用wizard。

可以添加/删除/隐藏series等等，并可改变图表风格.

using System;
using System.Text;
using System.IO;

using DevExpress.ExpressApp.Chart.Win;
using DevExpress.ExpressApp.Chart;
using DevExpress.XtraCharts;

namespace DynamicChartSolution.Module.Win
{
    public class ChartManagerWin
    {
        private ChartControl chartControl;
        private IModelChartListView chartModel;
        private SeriesBuilder builder;
        /// <summary>
        /// 在ViewController中创建ChartManagerWin的方法:
        /// ChartControl cc=(((ListView)View).Editor as ChartListEditor).ChartControl
        /// IModelChartListView m=(IModelChartListView)View.Model
        /// new ChartManagerWin(cc,m)
        /// </summary>
        /// <param name="control"></param>
        /// <param name="model"></param>
        public ChartManagerWin(ChartControl control, IModelChartListView model)
        {
            this.chartControl = control;
            this.chartModel = model;
        }
        /// <summary>
        /// 使用SeriesBuilder创建一个Series
        /// </summary>
        /// <returns></returns>
        public SeriesBuilder GetSeriesBuilder()
        {
            return builder=new SeriesBuilder();
        }
        public SeriesBuilder GetSeriesBuilder(string seriesName,DevExpress.XtraCharts.ViewType viewType)
        {
            return builder=new SeriesBuilder(seriesName, viewType);
        }
        /// <summary>
        /// 将Chart的更改保存到Model中
        /// </summary>
        /// <param name="model"></param>
        public void SaveChanges()
        {
            MemoryStream ms = new MemoryStream();
            chartControl.SaveToStream(ms);
            chartModel.ChartSettings.Settings = Encoding.UTF8.GetString(ms.ToArray());
        }
        /// <summary>
        /// 改变chart显示风格
        /// </summary>
        /// <param name="style"></param>
        public void ChangeStyle(DevExpress.XtraCharts.ViewType style)
        {
            foreach (Series s in chartControl.Series)
            {
                s.ChangeView(style);
            }
            SaveChanges();
        }
        //需要注意的是，如果添加的Series和当前图表风格不同时不会显示
        public void AddSeries(params Series[] series)
        {
            chartControl.Series.AddRange(series);
            SaveChanges();
        }
        public void RemoveSeries(string seriesName)
        {
            if(chartControl.Series[seriesName]!=null)
                chartControl.Series.Remove(chartControl.Series[seriesName]);
            SaveChanges();
        }
        public void SetVisibility(string seriesName,bool visible)
        {
            chartControl.Series[seriesName].Visible = visible;
        }
        
    }
    public class SeriesBuilder
    {
        private Series series;
        public Series Series
        {
            get { return series; }
        }
        public SeriesBuilder()
        {
            series = new Series();
        }
        public SeriesBuilder(string seriesName,DevExpress.XtraCharts.ViewType viewType)
        {
            series = new Series(seriesName, viewType);
        }
        public string Name
        {
            set { series.Name = value; }
        }
        public DevExpress.XtraCharts.ViewType ViewType
        {
            set { series.ChangeView(value); }
        }
        public object DataSource
        {
            set {  series.DataSource=value; }
        }
        public string ArgumentDataMember
        {
            set { series.ArgumentDataMember = value; }
        }
        public DevExpress.XtraCharts.ScaleType ArgumentScaleType
        {
            set { series.ArgumentScaleType = value; }
        }
        public DevExpress.XtraCharts.ScaleType ValueScaleType
        {
            set { series.ValueScaleType = value; }
        }
        public string ValueDataMember
        {
            set { series.ValueDataMembers.AddRange(value); }
        }
        public string SummaryFunction
        {
            set { series.SummaryFunction=value; }
        }
        public void AddDataFilter(string columnName,string columnTypeName,DataFilterCondition condition,object value)
        {
            series.DataFilters.Add(columnName, columnTypeName, condition, value);
        }
    }
}